Parent Maths Workshop Chorleywood Primary School 2015/16

Parent Maths Workshop

Chorleywood Primary SchoolChorleywood Primary School2015/162015/16

Aims of the Workshop• To outline the main changes to the new

primary maths curriculum.• To outline the clear progression of the

four calculation methods and how these are taught at Chorleywood.

• To outline the changes in the KS1 & KS2 SATs 2016

• To provide parents with ideas that they can use at home to support children’s maths development.

Key Aims of the New Maths Curriculum•Fluent recall of mental maths facts

e.g. times tables, number bonds. Etc.•To reason mathematically – children

need to be able to explain the mathematical concepts with number sense; they must explain how they got the answer and why they are correct.

•Problem solving – applying their skills to real-life contexts.

Key Differences of the new maths Curriculum:• Five-year-olds are expected to learn to count up

to 100 (compared to 20 under the old curriculum) and learn number bonds to 20 (was up to 10).

• Simple fractions (1/4 and 1/2) are taught from KS1, and by the end of primary school, children should be able to convert decimal fractions to simple fractions (e.g. 0.375 = 3/8) and calculate with fractions.

• By the age of nine, children are expected to know times tables up to 12×12 (was 10×10 by the end of primary school).

Good practice in Maths today!• Mental calculation skills are vital.

• Children need the ability to estimate.

e.g. If I have 18 sweets in one bag and 33 sweets in another bag, how many do I have altogether.

• Children can estimate by adding 20 and 30 and know that

roughly the answer should be around 50.

Good practice in mathematics• All children need to learn maths in a real life context. As well as knowing 7x7=49. Children need to be able to do the following: There are 7 fields, each field has

7 sheep in them. How many sheep are there in total?

• Children need to be able to explain how they have calculated or solved a problem.

• In the new curriculum, written calculations are taught at an earlier age. The mental methods are essential for supporting pupils understanding of these written calculations.

Good practice in mathematics

•Connections are made between mathematics topic areas, other subjects and between objectives.

•Children are taught to reason mathematically so that they able to consider if their answers are plausible.

Children are taught to consider the most effective calculation method and approach to calcualtions.

How do children learn the calculation methods?

• Counting of objects and mental counting.

• Early stages of calculation with learning of addition and subtraction number facts, with recording.

5 + 8 = or 13 = + 5

• Work with structured number lines

• Work with larger numbers, unstructured number lines and informal jottings.

e.g. 47 + 26 73

+3+20

+3

47 50 70 73

0 1 2 3 4 5 6 7 8 9 10

• Informal written methods, first with whole numbers and decimals.

• Formal written methods.

• With any calculation, teach children to consider first whether a mental method is appropriate and remembering to estimate first.

76 + 47 = 76 + 40 +7 =

116 + 7 = 123

Remember to partition

I must remember to add the least

significant digit first

(8+3)

(60+90)

(300+400)

1. Practical addition of real objects.

2. Use of a structured number line to add.

3. Partitioning to add.

Addition

100 20 3 = + +3 20 100

4. Use of an unstructured number line. 37 + 48=

Addition Continued…

48 7868 8058

+10+5+2

85

+10 +10

5. Expanded horizontal method, leading to columnar addition: Adding the least significant digit first.

235 +123= Estimate: 235 +123 is nearly 240 + 120 so estimate answer should be near 360.Illustration of how to use Dienes equipment to ensure children have an

understanding of place value when using columnar addition.

Empty number lines will still be used at this stage to support.

Addition Continued…

6. Columnar addition (formal written method):When children are confident working with larger numbers using the previous strategies, they will be introduced to ‘carrying’ digits. 2856+1095

Estimate: 2900+1100 =4000 Answer should be less as I have rounded up.

Children will eventually move on to adding larger numbers as well as decimal numbers and adding more than 2 numbers at a time.

Addition Continued…

2856 +1095

3951 1 1

1. Subtraction as taking away from a group:

2. Subtracting by counting back and on: children begin to use numbered lines to support their own calculations, initially counting back in ones before beginning to work more efficiently.

3. Finding the difference by either counting on or back.

Subtraction

4. Subtracting TU – U and TU – TU: use of an unstructured number line. Use empty number lines to find the difference by bridging through multiples of ten.

Subtract by starting with the first number and partitioning the second, i.e.

74 - 27

74 – 20 = 5454 – 4 = 5050 – 3 = 47

Subtraction Continued…

5. First stage of column method, including expanded method:•Written recording should follow teacher modelling around the size of numbers and place value using a variety of concrete materials, e.g. straws, Numicon, Dienes and place-value cards.

Subtraction Continued…

6. Second stage of column method: the concept of exchange is introduced through continued use of practical equipment (manipulatives).

Children will eventually move on to subtracting larger numbers as well as decimal numbers.

Subtraction Continued…

1. Developing early conceptual understanding of multiplication: practical multiplication - 2 x 4 2 lots of 4.

2. Understanding multiplication as repeated addition: use of arrays and number lines. 4 x 5

or

Number lines:

6 X 4 = 24

So: ‘Six taken four times”

Multiplication

3. Relate multiplying a 2-digit by 1-digit number using repeated addition and arrays to represent

4. Relate multiplying a 3/2-digit by 1-digit number with arrays towards using long/short multiplication

Multiplication continued…

5. Relate multiplying a 4/3/2-digit by 1/2-digit number with grid to using long multiplication.

6. Relate multiplying a 4/3/2-digit by 1/2-digit number with grid to using short multiplication.

Children will eventually move on to multiplying larger numbers as well as decimal numbers.

Multiplication continued…

1. Sharing or Grouping – Division is initially represented pictorially.

6 sweets shared between 2 people. How many each?

There are 6 people in a room. Put them into groups of 2. How many groups

can you make?

2. Using a number line and arrays to show division.

Division

Sharing and grouping are two totally different concepts that

children need to understand.

6 ÷2 = 3

3. Dividing a 2-digit by 1-digit number, representing this efficiently on a number line.

4. Dividing a 3/2-digit by 1-digit number, representing this efficiently on a number line, also in relation to long division

Division continued…

5. Dividing a 4/3/2-digit by 1-digit number, in relation to long division.

Division continued…

6. Dividing a 4/3/2-digit by 2/1-digit number, in relation to long and then short division

Division continued…

2016 SATs

2016 SATs

2016 KS1 SATs – More demanding content

How you can help at home• A focus on mental calculations.

• The ability to estimate.

• To use maths in a real life context.

• To ask children to explain how they have calculated

something using a method that suits them.

• Teach children written calculations following the

progression in the calculations policy (given as a handout).

• Ensure children are confident with their addition bonds

and multiplication tables (up to 12x12) – and make

sure they can use the related inverse facts too!

Email resources:

•This PowerPoint

•Calculations Policy 2014

•KS1 & KS2 sample papers

(arithmetic and reasoning)